Many keys will fail to display on various terminals, and that can't be
avoided. However, when key-description returns something that won't
display properly on certain terminals, it means that help displays
such as that of C-h b are not meaningful either. That is not good.
Maybe not. But I don't think that's much of a problem - or, rather, I don't
think there's much that can be done about it. If a user has the proper
fonts, then the characters are displayed; otherwise, they are not. There is
nothing different here from using a Web browser or other applications.
Novice users might wonder about the empty boxes displayed, but they will
wonder the same thing in other apps.
C-h b is supposed to describe the bindings, which means that it ought
to meet a somewhat higher standard of comprehensibility than ordinary
buffer contents.
Also, if you don't edit Chinese, you won't get Chinese characters in
your files. But you will get them in C-h b output.
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